Neocaridina. Neo for short. Regardless of what color you choose, if you want to keep a line looking nice, then you need to cull the lesser desired colored shrimp. You could have a cull tank, sell the culls, put the culls in a community tank, etc.
I'm not sure what bloody mary x sakura might look like, I've only seen bloody mary x painted fire red. They're just red shrimp. The only downside to the BM line is that BM shrimp take longer to color up than regular red cherries, but they have a nice, translucent coloration to them.